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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3961) Filters should be able to skip data that they know will fail
Date Wed, 12 Aug 2015 21:11:46 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14694176#comment-14694176
] 

Josh Elser commented on ACCUMULO-3961:
--------------------------------------

Sounds like a good idea to me. Being able to skip the latter part of a row seems like a common
case.

Assuming it requires changes to Filter (and thus things covered by public API), we may have
to target 1.8 instead of 1.7.1. We can cross that bridge when we get there though.

> Filters should be able to skip data that they know will fail
> ------------------------------------------------------------
>
>                 Key: ACCUMULO-3961
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3961
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: tserver
>    Affects Versions: 1.7.0
>            Reporter: Russ Weeks
>            Assignee: Russ Weeks
>            Priority: Minor
>              Labels: filter, iterator
>             Fix For: 1.7.1
>
>
> A [filter|http://accumulo.apache.org/1.7/apidocs/org/apache/accumulo/core/iterators/Filter.html]
should be able to cause its source to advance past key/value pairs that it knows will be blocked
by the filter. For example, the [ColumnSliceFilter|http://accumulo.apache.org/1.7/apidocs/index.html?org/apache/accumulo/core/iterators/user/ColumnSliceFilter.html]
should be able to advance to the beginning of the slice in the next row, if it has detected
that it has reached the end of the slice in the current row.
> Inspired by HBase's [FilterBase|https://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/FilterBase.html]
and [ColumnRangeFilter|https://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/ColumnRangeFilter.html].



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